Aqueous fluoro modified urethane resin and preparation of aqueous fluoro modified urethane resin paint

A technology of fluorine-modified polyurethane and polyurethane resin, which is applied in the field of preparation of water-based polyurethane resin, which can solve the problems of anti-fouling, poor self-cleaning, high critical surface tension, etc., and achieves convenient construction, low VOC content, and good adhesion Effect

Inactive Publication Date: 2010-09-22
HANGZHOU ZHIJIANG SILICONE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, compared with fluorocarbon resin, since the urethane bond and urea bond contained in polyurethane resin are stronger polar bonds, its crit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Embodiment 1: a kind of preparation method of aqueous fluorine-modified polyurethane resin, it comprises the steps:

[0043] (1) Preparation of fluorine-modified polyurethane prepolymer

[0044] 1) Add macromolecular polyols to the reaction kettle equipped with stirring paddles, thermometers, and reflux condensers. After vacuum dehydration at 95°C for 1.5 hours, cool to below 50°C, add isocyanate monomers, and heat up to 85°C Reaction 3h;

[0045] 2) After the reaction in step 1), the temperature of the reaction kettle is lowered to below 50°C, adding a compound with a hydrophilic group, a chain extender, and adding a solvent for viscosity adjustment, and then raising the temperature to 80°C for reflux reaction for 1.5h, and the reaction Properly add solvent during the process to adjust the viscosity of the prepolymer;

[0046]3) After the reaction in step 2), the temperature of the reactor is lowered to below 50°C, adding fluorine-containing diol, solvent and catalys...

Example Embodiment

[0057] Embodiment 2: a kind of preparation method of aqueous fluorine-modified polyurethane resin, it comprises the steps:

[0058] (1) Preparation of fluorine-modified polyurethane prepolymer

[0059] 1) Add macromolecular polyols to the reaction kettle equipped with stirring paddles, thermometers, and reflux condensers. After vacuum dehydration at 100°C for 1 hour, cool to below 50°C, add isocyanate monomers, and heat up to 90°C for reaction 2.5 hours;

[0060] 2) After the reaction in step 1) is completed, the temperature of the reactor is lowered to below 50°C, adding a compound with a hydrophilic group, a chain extender, and adding a solvent for viscosity adjustment, and then raising the temperature to 75°C for reflux reaction for 3 hours, the reaction process Appropriate additional solvent in the medium to adjust the viscosity of the prepolymer;

[0061] 3) After the reaction in step 2), the temperature of the reactor is lowered to below 50°C, adding fluorine-containin...

Example Embodiment

[0072] Embodiment 3: a kind of preparation method of aqueous fluorine-modified polyurethane resin, it comprises the steps:

[0073] (1) Preparation of fluorine-modified polyurethane prepolymer

[0074] 1) Add macromolecular polyols to the reaction kettle equipped with stirring paddles, thermometers, and reflux condensers. After vacuum dehydration at 90°C for 2 hours, cool to below 50°C, add isocyanate monomers, and heat up to 85°C for reaction 3.5 hours;

[0075] 2) After the reaction in step 1), the temperature of the reactor is lowered to below 50°C, adding a compound with a hydrophilic group, a chain extender, and adding a solvent for viscosity adjustment, and then raising the temperature to 78°C for reflux reaction for 2 hours, the reaction process Appropriate additional solvent in the medium to adjust the viscosity of the prepolymer;

[0076] 3) After the reaction in step 2), the temperature of the reactor is lowered to below 50°C, adding fluorine-containing diol, solve...

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PUM

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Abstract

The invention relates to a preparation method of an aqueous urethane resin, in particular to an aqueous fluoro modified urethane resin and an aqueous fluoro modified urethane resin paint prepared by an aqueous fluoro modified urethane resin preparation method. The method comprises the following steps: preparing a fluoro modified polyurethane prepolymer, preparing the aqueous fluoro modified urethane resin by the aqueous fluoro modified urethane resin preparation method, and then preparing the aqueous fluoro modified urethane resin paint from the aqueous fluoro modified urethane resin. The aqueous fluoro modified urethane resin paint can be prepared by utilizing the product of the invention, and the prepared water paint is a single-component and normal-temperature curing one which facilitates construction and has favorable adhesive force, smudge resistance, water resistance, alkali resistance, durability and the like. Besides, the water paint needs no curing agent or solvent, thereby fully reflecting the characteristics of safety and environmental friendliness.

Description

[0001] technical field [0002] The invention relates to a method for preparing a water-based polyurethane resin, in particular to the water-based fluorine-modified polyurethane resin and the coating of the water-based fluorine-modified polyurethane resin formed by the method for preparing the water-based fluorine-modified polyurethane resin. Background technique [0003] Water-based polyurethane is a type of water-based resin that has developed rapidly in recent years. It has excellent properties such as chemical resistance, flexibility, mechanical strength, and thermal stability inherent in general polyurethane resins, and it has no pollution to the environment, poisoning and fire The risk is small. Polyurethane raw material suppliers in Europe, America, Japan and other countries have developed resins and curing agents suitable for water-based polyurethane systems, and made water-based coatings with them, which are used in high-end and mid-range wood (furniture, etc.), hig...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/50C08G18/10C09D175/08
Inventor 何小瑜陶小乐何永富王珂琳张兴元戴家兵
Owner HANGZHOU ZHIJIANG SILICONE CHEM
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